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scroll, SetScrollTop, SetScrollLeft in dom-element-scroll with test

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This commit is contained in:
tigercosmos 2017-11-06 00:32:11 +08:00
parent 41a5a8c75f
commit 9965f7e2cc
4 changed files with 157 additions and 5 deletions
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51
components/script/dom/element.rs
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@ -363,6 +363,19 @@ impl Element {
!self.overflow_y_is_visible()
}
// https://drafts.csswg.org/cssom-view/#scrolling-box
fn has_scrolling_box(&self) -> bool {
// TODO: scrolling mechanism, such as scrollbar (We don't have scrollbar yet)
// self.has_scrolling_mechanism()
self.overflow_x_is_hidden() ||
self.overflow_y_is_hidden()
}
fn has_overflow(&self) -> bool {
self.ScrollHeight() > self.ClientHeight() ||
self.ScrollWidth() > self.ClientWidth()
}
// used value of overflow-x is "visible"
fn overflow_x_is_visible(&self) -> bool {
let window = window_from_node(self);
@ -376,6 +389,20 @@ impl Element {
let overflow_pair = window.overflow_query(self.upcast::<Node>().to_trusted_node_address());
overflow_pair.y == overflow_y::computed_value::T::visible
}
// used value of overflow-x is "hidden"
fn overflow_x_is_hidden(&self) -> bool {
let window = window_from_node(self);
let overflow_pair = window.overflow_query(self.upcast::<Node>().to_trusted_node_address());
overflow_pair.x == overflow_x::computed_value::T::hidden
}
// used value of overflow-y is "hidden"
fn overflow_y_is_hidden(&self) -> bool {
let window = window_from_node(self);
let overflow_pair = window.overflow_query(self.upcast::<Node>().to_trusted_node_address());
overflow_pair.y == overflow_y::computed_value::T::hidden
}
}
#[allow(unsafe_code)]
@ -1471,7 +1498,13 @@ impl Element {
return;
}
// Step 10 (TODO)
// Step 10
if !self.has_css_layout_box() ||
!self.has_scrolling_box() ||
!self.has_overflow()
{
return;
}
// Step 11
win.scroll_node(node, x, y, behavior);
@ -1927,7 +1960,13 @@ impl ElementMethods for Element {
return;
}
// Step 10 (TODO)
// Step 10
if !self.has_css_layout_box() ||
!self.has_scrolling_box() ||
!self.has_overflow()
{
return;
}
// Step 11
win.scroll_node(node, self.ScrollLeft(), y, behavior);
@ -2020,7 +2059,13 @@ impl ElementMethods for Element {
return;
}
// Step 10 (TODO)
// Step 10
if !self.has_css_layout_box() ||
!self.has_scrolling_box() ||
!self.has_overflow()
{
return;
}
// Step 11
win.scroll_node(node, x, self.ScrollTop(), behavior);